Questions relating to (pseudo)randomness, random oracles, and stochastic processes.
Questions tagged [random]
1860 questions
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Generating 5 random numbers less than 100 that add up to a number, 180 for example
I have found an answer (this) showing how to generate random numbers that add up to a number, but I need those numbers to be less that 100. How might I go about this?
Jake Potrebic
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Normally distributed Question. The top 1 percent of all in what range?
An IQ test produces scores that are normally distributed with mean value 100
and standard deviation 14.2. The top 1 percent of all scores are in what range?
I'm not entirely sure what the question is even asking.
I understand that the bottom is…
agelakute
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Normal Random Variable Question Check. Find the probability that all of them scored below 600.
The Scholastic Aptitude Test mathematics test scores across the population of
high school seniors follow a normal distribution with mean 500 and standard
deviation 100. If five seniors are randomly chosen, find the probability that all of them…
agelakute
- 13
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Generate a serial number whose probability to be guessed is less than 1/1000
I'm asked to generate random serial numbers whose probability to be guessed is less than 1/1000. How to find out in which range should these numbers be ?
user957479
- 101
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Is product of random numbers still random?
If I have a function f that generates a random number uniformly distributed between 1 and 5 then can I say that g=f*f generates a random number uniformly distributed between 1 and 25?
JohnyC
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Generating random versions of cubic and quadratic curve
this might be a basic question to you guys but me having very limited(near to none) applied math experience I am not sure to figure this out rightly.
I've two kind of curves cubic and quadratic and I need a function to randomize them. say for e.g…
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An equation about random variables
Consider two mutually independent random variables ${v_1},{v_2}$, which are the Gaussian white noise with distribution $N(0,1)$. We suppose they satisfy the following equation $({v_1}+a_1){w_1} + ({v_2}+a_2){w_2} = 0$, where ${a_1},{a_2}$ are the…
wenbo
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Random variable over a random binary sequence
is it possibile to construct a random variable such that the avarage of its values matching 0s in a binary sequence is double than its values matching 1s?
For instance given a binary random sequence of 0s and 1s assign to each value of the sequence…
francesco
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How much randomness is in human-generated random digit string?
Suppose someone is asked to provide a long string of random digits, for example:
4866710938572235108576927175549668592830123185576923856998372006958477486523
(just typed on keyboard, not generated in any way)
How good is it expected to be if used…
Vi0
- 331
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Pseudorandom binary mask for animated dissolve effect
I'd like to create an animated binary dissolve effect:
The image was created with The GIMP's Dissolve Layer mode at 50% and blends the originally solid black text into the white background. The mask appears random, but I think it's not really, as…
handle
- 109
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Overall energy input in random vibration tests
I have got a question concerning the calculation of the overall energy input in random vehicle vibration tests.
I have got different power spectral density levels for different random vehicle vibration tests and would like to compare them with each…
Roy R
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Determining whether signal is power or energy from autocorrelation
I want to know whether it is possible to determine whether a signal is power or energy from it's autocorrelation function. If this is possible, please explain the method in detail.
Amit Sonik
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Are my Video Game Losses Random?
I'm playing Overwatch in ranked, and want to know whether my matchups are "fair". That is I'm not being placed with significantly higher or lower skilled players.
So I can play lots of games (say 30), and record "win" or "lose" for each of them. At…
Bhagwad Jal Park
- 113
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What is the formula for the sample size to check that random generated decimal numbers are really random?
We are generating random numbers: 0 1 2 3 4 5 6 7 8 9
Question: How many samples do I need to assume that the chances were 10% per number?
Are there any formulas if we know that we are generating the following numbers: 0 1 2 3 4 5 6 7 8 9?
Ex.: I…
pepite
- 105
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If we would have a perfect random decimal number generator, what would the chances be for the occurence of the numbers?
If we would have a perfect random decimal number generator, so a one that generates from: 0 1 2 3 4 5 6 7 8 9 - than what would be the chances to get ex.: 1 ? or 2? or 3? and so on..
Question: would it be the same, so 10% chance? Or it depends on…
pepite
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